Here are some guidelines, according to Harlequin:
Silhouette Romantic SuspenseWhat do you think? Do you have opinions on category romance? What are the pros and cons? Do I have any takers to critique my query and synopsis? And lastly, are there any of you out there that have submitted to the Golden Heart? Tell me about it!
Sparked by Danger; Fueled by Passion.
Length: 55,000–60,000 words
Silhouette Romantic Suspense books offer an escape read where true-to-life heroines find themselves in the throes of extraordinary circumstances...and in the arms of powerful heroes.
The hero should be a force to contend with. He may be harsh and direct, but never cruel. Though formidable and heroic, he is capable of being saved, and it is up to the heroine to get him there. Our heroines should be complex, strong and smart. As independent as the heroine may be, she is often in jeopardy and needs the hero's help to overcome obstacles.
The conflicts should be dramatic and compelling. Romantic Suspense books revolve around classic plotlines that are tried and true in category romance: revenge, women in jeopardy, espionage, law enforcement and military, reunion romances, secret babies and others. Romantic Suspense stories will be consistently high on sensuality, as well as romantic and sexual tension.